ref: 4746d23891ba45977b5f615859455a4ae7ec6f6c
dir: /src/v_video.c/
//
// Copyright(C) 1993-1996 Id Software, Inc.
// Copyright(C) 1993-2008 Raven Software
// Copyright(C) 2005-2014 Simon Howard
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// DESCRIPTION:
// Gamma correction LUT stuff.
// Functions to draw patches (by post) directly to screen.
// Functions to blit a block to the screen.
//
#include <stdio.h>
#include <string.h>
#include <math.h>
#include "i_system.h"
#include "doomtype.h"
#include "deh_str.h"
#include "i_input.h"
#include "i_swap.h"
#include "i_video.h"
#include "m_bbox.h"
#include "m_misc.h"
#include "v_video.h"
#include "w_wad.h"
#include "z_zone.h"
#include "config.h"
#ifdef HAVE_LIBPNG
#include <png.h>
#endif
// TODO: There are separate RANGECHECK defines for different games, but this
// is common code. Fix this.
#define RANGECHECK
// Blending table used for fuzzpatch, etc.
// Only used in Heretic/Hexen
byte *tinttable = NULL;
// villsa [STRIFE] Blending table used for Strife
byte *xlatab = NULL;
// The screen buffer that the v_video.c code draws to.
static pixel_t *dest_screen = NULL;
int dirtybox[4];
// haleyjd 08/28/10: clipping callback function for patches.
// This is needed for Chocolate Strife, which clips patches to the screen.
static vpatchclipfunc_t patchclip_callback = NULL;
//
// V_MarkRect
//
void V_MarkRect(int x, int y, int width, int height)
{
// If we are temporarily using an alternate screen, do not
// affect the update box.
if (dest_screen == I_VideoBuffer)
{
M_AddToBox (dirtybox, x, y);
M_AddToBox (dirtybox, x + width-1, y + height-1);
}
}
//
// V_CopyRect
//
void V_CopyRect(int srcx, int srcy, pixel_t *source,
int width, int height,
int destx, int desty)
{
pixel_t *src;
pixel_t *dest;
#ifdef RANGECHECK
if (srcx < 0
|| srcx + width > SCREENWIDTH
|| srcy < 0
|| srcy + height > SCREENHEIGHT
|| destx < 0
|| destx + width > SCREENWIDTH
|| desty < 0
|| desty + height > SCREENHEIGHT)
{
I_Error ("Bad V_CopyRect");
}
#endif
V_MarkRect(destx, desty, width, height);
src = source + SCREENWIDTH * srcy + srcx;
dest = dest_screen + SCREENWIDTH * desty + destx;
for ( ; height>0 ; height--)
{
memcpy(dest, src, width * sizeof(*dest));
src += SCREENWIDTH;
dest += SCREENWIDTH;
}
}
//
// V_SetPatchClipCallback
//
// haleyjd 08/28/10: Added for Strife support.
// By calling this function, you can setup runtime error checking for patch
// clipping. Strife never caused errors by drawing patches partway off-screen.
// Some versions of vanilla DOOM also behaved differently than the default
// implementation, so this could possibly be extended to those as well for
// accurate emulation.
//
void V_SetPatchClipCallback(vpatchclipfunc_t func)
{
patchclip_callback = func;
}
//
// V_DrawPatch
// Masks a column based masked pic to the screen.
//
void V_DrawPatch(int x, int y, patch_t *patch)
{
int count;
int col;
column_t *column;
pixel_t *desttop;
pixel_t *dest;
byte *source;
int w;
y -= SHORT(patch->topoffset);
x -= SHORT(patch->leftoffset);
// haleyjd 08/28/10: Strife needs silent error checking here.
if(patchclip_callback)
{
if(!patchclip_callback(patch, x, y))
return;
}
#ifdef RANGECHECK
if (x < 0
|| x + SHORT(patch->width) > SCREENWIDTH
|| y < 0
|| y + SHORT(patch->height) > SCREENHEIGHT)
{
I_Error("Bad V_DrawPatch");
}
#endif
V_MarkRect(x, y, SHORT(patch->width), SHORT(patch->height));
col = 0;
desttop = dest_screen + y * SCREENWIDTH + x;
w = SHORT(patch->width);
for ( ; col<w ; x++, col++, desttop++)
{
column = (column_t *)((byte *)patch + LONG(patch->columnofs[col]));
// step through the posts in a column
while (column->topdelta != 0xff)
{
source = (byte *)column + 3;
dest = desttop + column->topdelta*SCREENWIDTH;
count = column->length;
while (count--)
{
*dest = *source++;
dest += SCREENWIDTH;
}
column = (column_t *)((byte *)column + column->length + 4);
}
}
}
//
// V_DrawPatchFlipped
// Masks a column based masked pic to the screen.
// Flips horizontally, e.g. to mirror face.
//
void V_DrawPatchFlipped(int x, int y, patch_t *patch)
{
int count;
int col;
column_t *column;
pixel_t *desttop;
pixel_t *dest;
byte *source;
int w;
y -= SHORT(patch->topoffset);
x -= SHORT(patch->leftoffset);
// haleyjd 08/28/10: Strife needs silent error checking here.
if(patchclip_callback)
{
if(!patchclip_callback(patch, x, y))
return;
}
#ifdef RANGECHECK
if (x < 0
|| x + SHORT(patch->width) > SCREENWIDTH
|| y < 0
|| y + SHORT(patch->height) > SCREENHEIGHT)
{
I_Error("Bad V_DrawPatchFlipped");
}
#endif
V_MarkRect (x, y, SHORT(patch->width), SHORT(patch->height));
col = 0;
desttop = dest_screen + y * SCREENWIDTH + x;
w = SHORT(patch->width);
for ( ; col<w ; x++, col++, desttop++)
{
column = (column_t *)((byte *)patch + LONG(patch->columnofs[w-1-col]));
// step through the posts in a column
while (column->topdelta != 0xff )
{
source = (byte *)column + 3;
dest = desttop + column->topdelta*SCREENWIDTH;
count = column->length;
while (count--)
{
*dest = *source++;
dest += SCREENWIDTH;
}
column = (column_t *)((byte *)column + column->length + 4);
}
}
}
//
// V_DrawPatchDirect
// Draws directly to the screen on the pc.
//
void V_DrawPatchDirect(int x, int y, patch_t *patch)
{
V_DrawPatch(x, y, patch);
}
//
// V_DrawTLPatch
//
// Masks a column based translucent masked pic to the screen.
//
void V_DrawTLPatch(int x, int y, patch_t * patch)
{
int count, col;
column_t *column;
pixel_t *desttop, *dest;
byte *source;
int w;
y -= SHORT(patch->topoffset);
x -= SHORT(patch->leftoffset);
if (x < 0
|| x + SHORT(patch->width) > SCREENWIDTH
|| y < 0
|| y + SHORT(patch->height) > SCREENHEIGHT)
{
I_Error("Bad V_DrawTLPatch");
}
col = 0;
desttop = dest_screen + y * SCREENWIDTH + x;
w = SHORT(patch->width);
for (; col < w; x++, col++, desttop++)
{
column = (column_t *) ((byte *) patch + LONG(patch->columnofs[col]));
// step through the posts in a column
while (column->topdelta != 0xff)
{
source = (byte *) column + 3;
dest = desttop + column->topdelta * SCREENWIDTH;
count = column->length;
while (count--)
{
*dest = tinttable[((*dest) << 8) + *source++];
dest += SCREENWIDTH;
}
column = (column_t *) ((byte *) column + column->length + 4);
}
}
}
//
// V_DrawXlaPatch
//
// villsa [STRIFE] Masks a column based translucent masked pic to the screen.
//
void V_DrawXlaPatch(int x, int y, patch_t * patch)
{
int count, col;
column_t *column;
pixel_t *desttop, *dest;
byte *source;
int w;
y -= SHORT(patch->topoffset);
x -= SHORT(patch->leftoffset);
if(patchclip_callback)
{
if(!patchclip_callback(patch, x, y))
return;
}
col = 0;
desttop = dest_screen + y * SCREENWIDTH + x;
w = SHORT(patch->width);
for(; col < w; x++, col++, desttop++)
{
column = (column_t *) ((byte *) patch + LONG(patch->columnofs[col]));
// step through the posts in a column
while(column->topdelta != 0xff)
{
source = (byte *) column + 3;
dest = desttop + column->topdelta * SCREENWIDTH;
count = column->length;
while(count--)
{
*dest = xlatab[*dest + ((*source) << 8)];
source++;
dest += SCREENWIDTH;
}
column = (column_t *) ((byte *) column + column->length + 4);
}
}
}
//
// V_DrawAltTLPatch
//
// Masks a column based translucent masked pic to the screen.
//
void V_DrawAltTLPatch(int x, int y, patch_t * patch)
{
int count, col;
column_t *column;
pixel_t *desttop, *dest;
byte *source;
int w;
y -= SHORT(patch->topoffset);
x -= SHORT(patch->leftoffset);
if (x < 0
|| x + SHORT(patch->width) > SCREENWIDTH
|| y < 0
|| y + SHORT(patch->height) > SCREENHEIGHT)
{
I_Error("Bad V_DrawAltTLPatch");
}
col = 0;
desttop = dest_screen + y * SCREENWIDTH + x;
w = SHORT(patch->width);
for (; col < w; x++, col++, desttop++)
{
column = (column_t *) ((byte *) patch + LONG(patch->columnofs[col]));
// step through the posts in a column
while (column->topdelta != 0xff)
{
source = (byte *) column + 3;
dest = desttop + column->topdelta * SCREENWIDTH;
count = column->length;
while (count--)
{
*dest = tinttable[((*dest) << 8) + *source++];
dest += SCREENWIDTH;
}
column = (column_t *) ((byte *) column + column->length + 4);
}
}
}
//
// V_DrawShadowedPatch
//
// Masks a column based masked pic to the screen.
//
void V_DrawShadowedPatch(int x, int y, patch_t *patch)
{
int count, col;
column_t *column;
pixel_t *desttop, *dest;
byte *source;
pixel_t *desttop2, *dest2;
int w;
y -= SHORT(patch->topoffset);
x -= SHORT(patch->leftoffset);
if (x < 0
|| x + SHORT(patch->width) > SCREENWIDTH
|| y < 0
|| y + SHORT(patch->height) > SCREENHEIGHT)
{
I_Error("Bad V_DrawShadowedPatch");
}
col = 0;
desttop = dest_screen + y * SCREENWIDTH + x;
desttop2 = dest_screen + (y + 2) * SCREENWIDTH + x + 2;
w = SHORT(patch->width);
for (; col < w; x++, col++, desttop++, desttop2++)
{
column = (column_t *) ((byte *) patch + LONG(patch->columnofs[col]));
// step through the posts in a column
while (column->topdelta != 0xff)
{
source = (byte *) column + 3;
dest = desttop + column->topdelta * SCREENWIDTH;
dest2 = desttop2 + column->topdelta * SCREENWIDTH;
count = column->length;
while (count--)
{
*dest2 = tinttable[((*dest2) << 8)];
dest2 += SCREENWIDTH;
*dest = *source++;
dest += SCREENWIDTH;
}
column = (column_t *) ((byte *) column + column->length + 4);
}
}
}
//
// Load tint table from TINTTAB lump.
//
void V_LoadTintTable(void)
{
tinttable = W_CacheLumpName("TINTTAB", PU_STATIC);
}
//
// V_LoadXlaTable
//
// villsa [STRIFE] Load xla table from XLATAB lump.
//
void V_LoadXlaTable(void)
{
xlatab = W_CacheLumpName("XLATAB", PU_STATIC);
}
//
// V_DrawBlock
// Draw a linear block of pixels into the view buffer.
//
void V_DrawBlock(int x, int y, int width, int height, pixel_t *src)
{
pixel_t *dest;
#ifdef RANGECHECK
if (x < 0
|| x + width >SCREENWIDTH
|| y < 0
|| y + height > SCREENHEIGHT)
{
I_Error ("Bad V_DrawBlock");
}
#endif
V_MarkRect (x, y, width, height);
dest = dest_screen + y * SCREENWIDTH + x;
while (height--)
{
memcpy (dest, src, width * sizeof(*dest));
src += width;
dest += SCREENWIDTH;
}
}
void V_DrawFilledBox(int x, int y, int w, int h, int c)
{
uint8_t *buf, *buf1;
int x1, y1;
buf = I_VideoBuffer + SCREENWIDTH * y + x;
for (y1 = 0; y1 < h; ++y1)
{
buf1 = buf;
for (x1 = 0; x1 < w; ++x1)
{
*buf1++ = c;
}
buf += SCREENWIDTH;
}
}
void V_DrawHorizLine(int x, int y, int w, int c)
{
uint8_t *buf;
int x1;
buf = I_VideoBuffer + SCREENWIDTH * y + x;
for (x1 = 0; x1 < w; ++x1)
{
*buf++ = c;
}
}
void V_DrawVertLine(int x, int y, int h, int c)
{
uint8_t *buf;
int y1;
buf = I_VideoBuffer + SCREENWIDTH * y + x;
for (y1 = 0; y1 < h; ++y1)
{
*buf = c;
buf += SCREENWIDTH;
}
}
void V_DrawBox(int x, int y, int w, int h, int c)
{
V_DrawHorizLine(x, y, w, c);
V_DrawHorizLine(x, y+h-1, w, c);
V_DrawVertLine(x, y, h, c);
V_DrawVertLine(x+w-1, y, h, c);
}
//
// Draw a "raw" screen (lump containing raw data to blit directly
// to the screen)
//
void V_DrawRawScreen(byte *raw)
{
memcpy(dest_screen, raw, SCREENWIDTH * SCREENHEIGHT);
}
//
// V_Init
//
void V_Init (void)
{
// no-op!
// There used to be separate screens that could be drawn to; these are
// now handled in the upper layers.
}
// Set the buffer that the code draws to.
void V_UseBuffer(pixel_t *buffer)
{
dest_screen = buffer;
}
// Restore screen buffer to the i_video screen buffer.
void V_RestoreBuffer(void)
{
dest_screen = I_VideoBuffer;
}
//
// SCREEN SHOTS
//
typedef PACKED_STRUCT (
{
char manufacturer;
char version;
char encoding;
char bits_per_pixel;
unsigned short xmin;
unsigned short ymin;
unsigned short xmax;
unsigned short ymax;
unsigned short hres;
unsigned short vres;
unsigned char palette[48];
char reserved;
char color_planes;
unsigned short bytes_per_line;
unsigned short palette_type;
char filler[58];
unsigned char data; // unbounded
}) pcx_t;
//
// WritePCXfile
//
void WritePCXfile(char *filename, byte *data,
int width, int height,
byte *palette)
{
int i;
int length;
pcx_t* pcx;
byte* pack;
pcx = Z_Malloc (width*height*2+1000, PU_STATIC, NULL);
pcx->manufacturer = 0x0a; // PCX id
pcx->version = 5; // 256 color
pcx->encoding = 1; // uncompressed
pcx->bits_per_pixel = 8; // 256 color
pcx->xmin = 0;
pcx->ymin = 0;
pcx->xmax = SHORT(width-1);
pcx->ymax = SHORT(height-1);
pcx->hres = SHORT(1);
pcx->vres = SHORT(1);
memset (pcx->palette,0,sizeof(pcx->palette));
pcx->reserved = 0; // PCX spec: reserved byte must be zero
pcx->color_planes = 1; // chunky image
pcx->bytes_per_line = SHORT(width);
pcx->palette_type = SHORT(2); // not a grey scale
memset (pcx->filler,0,sizeof(pcx->filler));
// pack the image
pack = &pcx->data;
for (i=0 ; i<width*height ; i++)
{
if ( (*data & 0xc0) != 0xc0)
*pack++ = *data++;
else
{
*pack++ = 0xc1;
*pack++ = *data++;
}
}
// write the palette
*pack++ = 0x0c; // palette ID byte
for (i=0 ; i<768 ; i++)
*pack++ = *palette++;
// write output file
length = pack - (byte *)pcx;
M_WriteFile (filename, pcx, length);
Z_Free (pcx);
}
#ifdef HAVE_LIBPNG
//
// WritePNGfile
//
static void error_fn(png_structp p, png_const_charp s)
{
printf("libpng error: %s\n", s);
}
static void warning_fn(png_structp p, png_const_charp s)
{
printf("libpng warning: %s\n", s);
}
void WritePNGfile(char *filename, byte *data,
int width, int height,
byte *palette)
{
png_structp ppng;
png_infop pinfo;
png_colorp pcolor;
FILE *handle;
int i, j;
int w_factor, h_factor;
byte *rowbuf;
if (aspect_ratio_correct)
{
// scale up to accommodate aspect ratio correction
w_factor = 5;
h_factor = 6;
width *= w_factor;
height *= h_factor;
}
else
{
w_factor = 1;
h_factor = 1;
}
handle = fopen(filename, "wb");
if (!handle)
{
return;
}
ppng = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL,
error_fn, warning_fn);
if (!ppng)
{
fclose(handle);
return;
}
pinfo = png_create_info_struct(ppng);
if (!pinfo)
{
fclose(handle);
png_destroy_write_struct(&ppng, NULL);
return;
}
png_init_io(ppng, handle);
png_set_IHDR(ppng, pinfo, width, height,
8, PNG_COLOR_TYPE_PALETTE, PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
pcolor = malloc(sizeof(*pcolor) * 256);
if (!pcolor)
{
fclose(handle);
png_destroy_write_struct(&ppng, &pinfo);
return;
}
for (i = 0; i < 256; i++)
{
pcolor[i].red = *(palette + 3 * i);
pcolor[i].green = *(palette + 3 * i + 1);
pcolor[i].blue = *(palette + 3 * i + 2);
}
png_set_PLTE(ppng, pinfo, pcolor, 256);
free(pcolor);
png_write_info(ppng, pinfo);
rowbuf = malloc(width);
if (rowbuf)
{
for (i = 0; i < SCREENHEIGHT; i++)
{
// expand the row 5x
for (j = 0; j < SCREENWIDTH; j++)
{
memset(rowbuf + j * w_factor, *(data + i*SCREENWIDTH + j), w_factor);
}
// write the row 6 times
for (j = 0; j < h_factor; j++)
{
png_write_row(ppng, rowbuf);
}
}
free(rowbuf);
}
png_write_end(ppng, pinfo);
png_destroy_write_struct(&ppng, &pinfo);
fclose(handle);
}
#endif
//
// V_ScreenShot
//
void V_ScreenShot(char *format)
{
int i;
char lbmname[16]; // haleyjd 20110213: BUG FIX - 12 is too small!
char *ext;
// find a file name to save it to
#ifdef HAVE_LIBPNG
extern int png_screenshots;
if (png_screenshots)
{
ext = "png";
}
else
#endif
{
ext = "pcx";
}
for (i=0; i<=99; i++)
{
M_snprintf(lbmname, sizeof(lbmname), format, i, ext);
if (!M_FileExists(lbmname))
{
break; // file doesn't exist
}
}
if (i == 100)
{
#ifdef HAVE_LIBPNG
if (png_screenshots)
{
I_Error ("V_ScreenShot: Couldn't create a PNG");
}
else
#endif
{
I_Error ("V_ScreenShot: Couldn't create a PCX");
}
}
#ifdef HAVE_LIBPNG
if (png_screenshots)
{
WritePNGfile(lbmname, I_VideoBuffer,
SCREENWIDTH, SCREENHEIGHT,
W_CacheLumpName (DEH_String("PLAYPAL"), PU_CACHE));
}
else
#endif
{
// save the pcx file
WritePCXfile(lbmname, I_VideoBuffer,
SCREENWIDTH, SCREENHEIGHT,
W_CacheLumpName (DEH_String("PLAYPAL"), PU_CACHE));
}
}
#define MOUSE_SPEED_BOX_WIDTH 120
#define MOUSE_SPEED_BOX_HEIGHT 9
//
// V_DrawMouseSpeedBox
//
// If box is only to calibrate speed, testing relative speed (as a measure
// of game pixels to movement units) is important whether physical mouse DPI
// is high or low. Line resolution starts at 1 pixel per 1 move-unit: if
// line maxes out, resolution becomes 1 pixel per 2 move-units, then per
// 3 move-units, etc.
static int linelen_multiplier = 1;
void V_DrawMouseSpeedBox(int speed)
{
extern int usemouse;
int bgcolor, bordercolor, red, black, white, yellow;
int box_x, box_y;
int original_speed;
int redline_x;
int linelen;
int i;
boolean draw_acceleration = false;
// Get palette indices for colors for widget. These depend on the
// palette of the game being played.
bgcolor = I_GetPaletteIndex(0x77, 0x77, 0x77);
bordercolor = I_GetPaletteIndex(0x55, 0x55, 0x55);
red = I_GetPaletteIndex(0xff, 0x00, 0x00);
black = I_GetPaletteIndex(0x00, 0x00, 0x00);
yellow = I_GetPaletteIndex(0xff, 0xff, 0x00);
white = I_GetPaletteIndex(0xff, 0xff, 0xff);
// If the mouse is turned off, don't draw the box at all.
if (!usemouse)
{
return;
}
// If acceleration is used, draw a box that helps to calibrate the
// threshold point.
if (mouse_threshold > 0 && fabs(mouse_acceleration - 1) > 0.01)
{
draw_acceleration = true;
}
// Calculate box position
box_x = SCREENWIDTH - MOUSE_SPEED_BOX_WIDTH - 10;
box_y = 15;
V_DrawFilledBox(box_x, box_y,
MOUSE_SPEED_BOX_WIDTH, MOUSE_SPEED_BOX_HEIGHT, bgcolor);
V_DrawBox(box_x, box_y,
MOUSE_SPEED_BOX_WIDTH, MOUSE_SPEED_BOX_HEIGHT, bordercolor);
// Calculate the position of the red threshold line when calibrating
// acceleration. This is 1/3 of the way along the box.
redline_x = MOUSE_SPEED_BOX_WIDTH / 3;
// Calculate line length
if (draw_acceleration && speed >= mouse_threshold)
{
// Undo acceleration and get back the original mouse speed
original_speed = speed - mouse_threshold;
original_speed = (int) (original_speed / mouse_acceleration);
original_speed += mouse_threshold;
linelen = (original_speed * redline_x) / mouse_threshold;
}
else
{
linelen = speed / linelen_multiplier;
}
// Draw horizontal "thermometer"
if (linelen > MOUSE_SPEED_BOX_WIDTH - 1)
{
linelen = MOUSE_SPEED_BOX_WIDTH - 1;
if (!draw_acceleration)
{
linelen_multiplier++;
}
}
V_DrawHorizLine(box_x + 1, box_y + 4, MOUSE_SPEED_BOX_WIDTH - 2, black);
if (!draw_acceleration || linelen < redline_x)
{
V_DrawHorizLine(box_x + 1, box_y + MOUSE_SPEED_BOX_HEIGHT / 2,
linelen, white);
}
else
{
V_DrawHorizLine(box_x + 1, box_y + MOUSE_SPEED_BOX_HEIGHT / 2,
redline_x, white);
V_DrawHorizLine(box_x + redline_x, box_y + MOUSE_SPEED_BOX_HEIGHT / 2,
linelen - redline_x, yellow);
}
if (draw_acceleration)
{
// Draw acceleration threshold line
V_DrawVertLine(box_x + redline_x, box_y + 1,
MOUSE_SPEED_BOX_HEIGHT - 2, red);
}
else
{
// Draw multiplier lines to indicate current resolution
for (i = 1; i < linelen_multiplier; i++)
{
V_DrawVertLine(
box_x + (i * MOUSE_SPEED_BOX_WIDTH / linelen_multiplier),
box_y + 1, MOUSE_SPEED_BOX_HEIGHT - 2, yellow);
}
}
}